Asbukyj



Aug. 31 1926.

D. F. ASBURY omm'onv FOR THE MOVABLE PARTS OF RADIO mums nun-s Filed Feb. 5, 1924 Patented Aug; 31, i326.

UNIT-1E3 A STA-refs nane nonsnY assume on KHASHINGTG'N', premier on 6OLUMBIA.

QPEBATOBJFOR THE MOVABLE PARTS F RADIO TUNING UNITS.

Application filed February 5, 1924. Serial No. 690,795

My iuventionrelates to operators for the movable parts of radio tuning units, and my i'sto provide improvements tor operatingthe movable parts oi a plu} & ltllljyeOi tuning units simultaneously and individually for the purposes set forth my; Pee pp i a io s. l y n be 583mm 8 080.; were d ,338.; ea 912 Yemen-e meeting- Prima y Pi dme an pe ating me na h t s s nl n a mmence o, p rate, mat n; iipears-rice nd t a s om a d adi y! id-.-easi. y; ppli d; ad oy. ppar us. at present commercial types substantially itht altemfiionw e lett r l y nventive eais apa e embed? ment i di re m chan l s iiires, ne. J

' -wh-ichs: llu at d1 n, he iaa i inerawin s but it am eun s oo l a ih uc ur he e n sh w n n e n y a disc osure Qt e eiit a atur s dqi li har p st s i In ayven ion iiIir a preferred form, and that its scope is as. def

ned is the. amende la ms-L n the aw n s Wh r -i 1 ike ara e s 1 ef ren e deno e err p mli e; Pill i the clifi'erent viewsg o r- Eigure 1; is an; elevation of a. portion of I a radio. receiving: set shoiyingia plurality of tuning units and apreferred form of my improved operating means associated there.- th; r

Figure '2, a plan hvie iy of one of the yield:

able supports I fonthe operator;

Eigurefi, a transverse section on the line e3 igure a V Figure 4 a transverse section-on the, line i E gure l M1 51:

fe'u er ew imi 7 11 E ure'e w ing a slight v modification 051115 invention.

Referring. now; tothe drawings in detail, 7 it, will be observed. that I; have, illustrated in.- part a apparatus ot. Well; known mmerc al type ncluding ah' s ar 0 aving: m unted here n; means i brackets a plu al y;- Q uni g; nits; 2 e end 4 e which a ter; be Qtany rif r red. yre, but ich: are here e ceme l llus r t da war ehl plaiee mlenser r achis a Stat. e Pl: a e est, as; ha e nd-: escrihe a f m l t on piclic e ns 8 1,7551; 68 10.8

0;; sear re;

689,338. Said tuning units are, arranged iiesi iiili i a. s-bradiska 15, 16 and 17 by means of Which they may be adjusted to cause them to tune with ditferent Wave lengths.

My improved means for adjusting the rotors b collectively and individually through the instrumentality ofthe dials or disks 15, 16 and 17 consists ofan elongated rod 18.of preferably rectangular cross section sup: ported from the base board 10 and slidably carrying a plurality of plates 19,; and 21 n ct ng p t ely, with h iie p e 1 of said dials or disks herebythey are simultaneously rotated When said bar shifted longitudinally, anddndividually rotated by shifting the plates 19, 2O and 2l longitudinally With respect to said rod. Preferably the rod 18 is, yieldably. supported to maintain the plates 19, 2O ;and,21;

at all times in correct drivingengagement with the peripheries, of; the dialscndislp 1.5, 16 and 17,respectively, and ='to so sup port said rod 1 provide a plurality of dupli cate deviceseaoh includinga roller 22 centrally grooved parallel'to and between its sides'as indicated at 23 to provide a short shaft 24 7 adapted to be received Within a U-shaped recess in upstanding lug 25 at one end of aninherently resilient plate 26, theother end ofwvhich is secured to'the base board 10, flanges 27 ,being proyided on, the roller to hold-the rods-1 8 against lateral movement and to thus maintain the same alined With the, peripheries o'f the dials or disks 1 5, 16, and--17; Th'eplates 26 are of such shape, that they may be secured to the base board 10 by the same fasteners that are utilized to securethe supporting brackets 11 of the tuning units 12,18 and lethereto,

and since the brackets 11, plates 26, rollers 22 and. the rod 18areformed; 0t metal, such parts serve to produce an electr cal connection between the tuning units, which con;

onal:

are; movable with sai is ie er i i re hi ed;

re s- 1 as drod-to were the dials; 11 r ea diridually shifted longitudinally with re spect to said rod, however, to rotate in- -dividual dials or disks, and in order to so shift them, I mount on said rod transversely thereof by means of blocks 80, shafts 31, each carrying a pair of eccentric disks 32 operating, respectively, between pairs of down-turned fingers 33 on said plates. Thus, when a shaft 31 is rotated by means of a suitable knob or hand grip device ill, the eccentrics react from the rod 18 against one or the other of each pair of fingers 33 to shift the associated plate longitudinally with respect to said rod. The lingers 33 at one end of each plate and other down turned fingers at the other end thereof cooperate with the rod 18 to prevent lateral movement of the plates with respect to said rod.

As set forth in my prior application 63 7 56, it is desirable in some instances to cause the movable part of one or more tuning; units to move at times at a differentrate of speed with respect to the movable parts of'other units when all of said movable parts are moved simultaneously, and to accomplish this purpose, I form one or more of the dials or disks of irregular outline and correspondingly shape the associated plate or olates 19, 20 or 21. so that driving contact is always maintained between such parts, for example, I chordally cut away a dial or disk as indicated at 36 and form the plate in association with such dial or disk with an offset portion 37 of such shape that it has rolling contact with the flat peripheral surface produced by said chordal, cut-away portion, and thus that particular dial or disk is caused to rotate, within the limits of its cut-away portion, at a difi'erent rate of speed from the other dials or disks, in which connection it will be observed that due to the present arrangement a correct relation of the irregular surfaces of the dials or disks with the companion surfaces of the associated plate or plates is maintained regardless of what simultaneous or individual adjustments are imparted to the dials or disks.

The modification shown in Figure 5 con sists in forming roller 22' with flanges 52"? of such depth that they extend slightly above the upper face of the rod 18 thereby to engage the sides of the plates 19, 20 and 21 that extend beyond the sides of the rod and thus hold said plates out of frictional contact with the red, the purpose being to render the plates freely slidable, so as to necessitate only slight force being applied to the eccentrics for operating them. When the plates are thus supported, the means to cause them to more with the rod 18 when the latter is shifted will be included in the eccentric operating means, such means consisting for example of a friction washer assen similar to that shown in association with the eccentric in my aforesaid application 683,756.

I claim 1. In radio apparatus, a tuning unit a pa rt of which is movable, an operator for moving said movable part bodily movable with respect thereto to secure rough ad ustments thereof, means to hold said operator against movement, and vcrnier means carried by said operator and movable with respect thereto to move said movable part to secure minute adjustments thereof when the operator is held against movement.

2. In radio apparatus, a tuning unit a part of which is movable, a bodily movable operator for moving said movable part to secure rough adjustments thereof, means to hold said operator against movement, and a member carried by said operator bodily movable with respect thereto to move said movable part to secure minute adjustments thereof when the operator is held against movement.

3. In radio apparatus, a tuning unit a part of which is movable, an operator movable to move said movable part to secure rough adjustments thereof, and a member carried by said operator and partaking of movement in the same direction as the latter independently thereof to move said movable part to secure minute adjustments thereof.

In radio apparatus a tuning unit a part of which is movable, an operator longitudinally movable to move said movable part to secure rough adjustments thereof, and a member carried by said operator and movable longitudinally thereof to move said movable part to secure minute adjustments thereof.

In radio apparatus, a tuning unit a part of which is movable, an operator movable to move said movable part to secure rough adjustments thereof, and a member slidable on said operator to move said movable part to secure minute adjustments thereof.

6. In radio apparatus, a tuning unit a part of which is movable, an operator bodily movable with respect to said movable part to move the latter to secure rough adjustments thereof, a member carried by and movable with respect to said operator to move said movable part to secure minute adjustments thereof, and means reacting from said operator to move said member.

7. In radio apparatus, a plurality of tuning units a part each of which is movable, a single operator for moving the movable parts of a plurality of said tuning units collectively, and Vernier means carried by said operator for moving said movable parts individually.

S. In radio apparatus, a tuning unit a partof which is movable, a bodily movable operator for moving said movable part, means to holdsaid operator against movement, a member slidable on said operator to move said movable part when said operator is held against movement, fingers on said member cooperating with said operator to hold said member against lateral movement With respect thereto, and an eccentric carried by said operator and cooperating With said fingers to slide said member.

9. In radio apparatus, aplurality of tuning units a part of each of which is movable, a rod common to a movable part of each unit for moving said parts collectively, a plurality of plates one between said rod and each movable part, and means carried by said rod for individually moving said plates thereby to individually move said movable parts.

10. In radio apparatus, a plurality of tuning units a part of each of Which is movable, a rod common to a movable part of each unit for n'ioving said parts collectively, a plurality of plates slidably mounted on said rod and operatively connected With said movable parts, respectively, and rotatable means carried by said rod for sliding said plates individually With respect thereto thereby to individually move said movable parts.

In testimony whereof I hereunto afiix"'1ny signature.

DORSEY F. ASBURY. 

